<!doctype html>
<html>
<head>
<meta charset="utf8">
<link rel="help" href="https://url.spec.whatwg.org/#dom-urlsearchparams-has">
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="resources/testharness-extras.js"></script>
<script>
test(function() {
    var params = new URLSearchParams('a=b&c=d');
    assert_true(params.has('a'));
    assert_true(params.has('c'));
    assert_false(params.has('e'));
    params = new URLSearchParams('a=b&c=d&a=e');
    assert_true(params.has('a'));
    params = new URLSearchParams('=b&c=d');
    assert_true(params.has(''));
    params = new URLSearchParams('null=a');
    assert_true(params.has(null));
}, 'has() basics');

test(function() {
    var params = new URLSearchParams('a=b&c=d&&');
    params.append('first', 1);
    params.append('first', 2);
    assert_true(params.has('a'), 'Search params object has name "a"');
    assert_true(params.has('c'), 'Search params object has name "c"');
    assert_true(params.has('first'), 'Search params object has name "first"');
    assert_false(params.has('d'), 'Search params object has no name "d"');
    params.delete('first');
    assert_false(params.has('first'), 'Search params object has no name "first"');
}, 'has() following delete()');
</script>
</head>
</html>
